-- The density of a closed jar full of air doesn't change, no matter how high you take it.
-- The density of the open air in the atmosphere that's all around you decreases steadily
as your altitude increases.
the density decreases
density decreases as air pressure increases
increases
As humidity increases, the air becomes less dense. This is because water vapor is less dense than dry air. So, as humidity increases, the overall density of air decreases.
as the altitude increases density of air decreases.This makes it harder to breath.
The density of air increases and then decreases as the sound wave passes.
as the altitude increases density of air decreases. This makes it harder to breath.
Becomes lighter and rises, the principle of hot air balloons.
The mass of the air bubbles remains the same as they rise in water, but their density decreases. This is because as the volume of the air bubbles increases, they displace more water, causing their density to decrease relative to the surrounding water.
it increases
Dangerous for human
the density increases